Diabetes... Blood test?

Colleen • FTM living with hubs and lil Declan Patrick in sunny Florida...
Hiya. I am just curious... Did the blood test that I had done in the beginning of my pregnancy test for diabetes automatically? I googled it and I see I was likely tested for glucose but I guess I'm dumb and I don't know if that's the same thing.
I had the glucose screening test done at 28 weeks or so, and I passed. 
I'm just asking about the blood test because I've been prone to getting cracks in my right heel lately, and my husband scared me by asking if I could have diabetes. I wasn't sure if it's correct to say I must not if I had my pregnancy blood test and glucose screening already. 
The cracks could also always be due to living in FL and wearing flip flops everyday!